Hurricane hunters monitored by the National Oceanic and Atmospheric Administration (NOAA) fly into hurricanes to give officials a closer look at brewing storms. Without the planes, it will be difficult to predict the strength and movement of Irma as it approaches the coast.

Florida’s congressional leaders say there’s no backup plane if any of the current fleet suffers a breakdown.

“It is troubling to be mid-hurricane season without an adequate NOAA backup aircraft capability in place,” Rep. Darren Soto (D-Fla.) wrote in a letter to acting Under Secretary of Commerce for Oceans and Atmosphere Benjamin Friedman, “especially on the eve [of] Hurricane Irma’s projected landfall on the east coast of the United States.”

Soto cites Section 413 of the Weather Research and Forecasting Innovation Act of 2017, which was drafted last year after a hurricane hunter aircraft had to land for emergency repairs during a storm. According to this law, the NOAA must maintain a backup aircraft capability in case one fails.

“We need to have these aircrafts during these hurricanes,” Soto said, “satellites look from above but we need eyes and ears in the middle of the hurricane to help predict and give people time to prepare.”

NOAA told News4 it has nine aircraft, three of which can fly into hurricanes. They also said they are “working” to get backup planes in place.